Preliminary Checks

PRELIMINARY CHECKS

Determine what driving conditions caused the complaint. One or more of the following conditions may be the cause of the complaint:

- Prolonged Idle
- Very High Ambient Temperature
- Slow Traffic
- Traffic Jams
- High Speed
- Steep Grades

1. RECENT SERVICE OR ACCIDENT REPAIR:
Determine if any recent service has been performed on the vehicle that may affect the cooling system operation. One or more of the following conditions may be the cause of the complaint:

- Engine adjustments (incorrect timing)
- Slipping engine accessory drive belt(s)
- Brakes (possibly dragging)
- Changed parts. Incorrect water pump, or pump rotating in wrong direction due to belt not correctly routed.
- Reconditioned radiator or cooling system refilling (possibly under filled or air trapped in system).